Bond Dissociation Energy (BDE) & Reaction Enthalpy Calculator
Estimate gas-phase reaction enthalpies (ΔH in kJ/mol) from average covalent bond dissociation energies by balancing energy input for bond cleavage against energy released in bond formation.
Estimated Reaction Enthalpy (ΔH)
Calculator Inputs
Estimated Reaction Enthalpy (ΔH)
Absolute Energy Magnitude
Exothermic Process: The newly formed product bonds are significantly stronger and more stable than the reactant bonds cleaved.
Bonds Broken vs Bonds Formed Energy Balance
Standard molecular thermochemistry tool for covalent bond energy accounting in gas-phase reactions.
Calculation Methodology
Reaction Enthalpy: ΔH_rxn = Σ [ Energy of Broken Reactant Bonds ] - Σ [ Energy of Formed Product Bonds ]. Breaking bonds is strictly endothermic (+); forming bonds is strictly exothermic (-).
Frequently Asked Questions
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